Cryptology ePrint Archive: BibTeX Citation of Report 2009/550

@misc{cryptoeprint:2009:550,
    author = {Yusuke Naito and Lei Wang and Kazuo Ohta},
    title = {How to Construct Cryptosystems and Hash Functions in Weakened Random Oracle Models},
    howpublished = {Cryptology ePrint Archive, Report 2009/550},
    year = {2009},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.